<?xml version="1.0"?>
<div class="add">

<b>let </b><font color="Maroon">V</font> be   <a href="bhsp_1.html#NM1">RealUnitarySpace</a>;<br/>

<b>assume </b><a NAME="E1:8"/>
<font color="Maroon">V</font> is <a href="rusub_4.html#V1" target="_self">finite-dimensional</a>
 ;<br/>

<b>then consider </b><font color="Maroon">A</font> being  <a href="finset_1.html#V1">finite</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font><b> such that </b><br/><a NAME="E3:8"/><i><font color="Green">E26</font></i>: 
<font color="Maroon">A</font> is    <a href="rusub_3.html#M1">Basis</a> of <font color="Maroon">V</font>
 <b>by </b><i/>;<br/>
<b>let </b><font color="Maroon">B</font> be    <a href="rusub_3.html#M1">Basis</a> of <font color="Maroon">V</font>;<br/>

<b>consider </b><font color="Maroon">p</font> being   <a href="finseq_1.html#NM1">FinSequence</a><b> such that </b><br/><a NAME="E5:8"/><i><font color="Green">E27</font></i>: 
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">p</font> <a href="hidden.html#R1">=</a> <font color="Maroon">A</font>
 <b>by </b><i><a class="ref" href="finseq_1.html#T73">FINSEQ_1:73</a></i>;<br/>
<b>reconsider </b><font color="Maroon">p</font> = <font color="Maroon">p</font> as    <a href="finseq_1.html#M2">FinSequence</a> of the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">V</font> <b>by </b><i>, <a class="ref" href="finseq_1.html#D4">FINSEQ_1:def 4</a></i>;<br/>
<b>set </b><font color="Maroon">Car</font> = <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> ;<br/>
<b>set </b><font color="Maroon">C</font> =  <a href="tarski.html#K3">union</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> ;<br/>
<a NAME="E7:8"/><i><font color="Green">E29</font></i>: 
 <a href="tarski.html#K3">union</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span>  <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E1:8_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="tarski.html#K3">union</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 ;<br/>

<b>then consider </b><font color="Maroon">R</font> being    <a href="hidden.html#M1">set</a> <b> such that </b><br/><a NAME="E3:8_1"/><i><font color="Green">E30</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">R</font>
 <b>and </b><br/><a NAME="E4:8_1"/><i><font color="Green">E31</font></i>: 
<font color="Maroon">R</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 <b>by </b><i><a class="ref" href="tarski.html#D4">TARSKI:def 4</a></i>;<br/>
<b>consider </b><font color="Maroon">L</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E6:8_1"/><i><font color="Green">E33</font></i>: 
<font color="Maroon">R</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L</font>
 <b>and </b><br/><a NAME="E7:8_1"/>
 ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> )
 <b>by </b><i/>;<br/>
<a NAME="E8:8_1"/>
<font color="Maroon">R</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font>
 
<b>by </b><i>, <a class="ref" href="rlvect_2.html#D8">RLVECT_2:def 8</a></i>;<br/>
<b>hence </b><a NAME="E9:8_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">B</font>
 <b>by </b><i/>;<br/>


</div><b>end;</b></div>
<b>then reconsider </b><font color="Maroon">C</font> =  <a href="tarski.html#K3">union</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span>  as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font> <b>by </b><i><a class="ref" href="xboole_1.html#T1">XBOOLE_1:1</a></i>;<br/>
<a NAME="E9:8"/><i><font color="Green">E35</font></i>: 
<font color="Maroon">B</font> is <a href="rlvect_3.html#V1">linearly-independent</a>
 
<b>by </b><i><a class="ref" href="rusub_3.html#D2">RUSUB_3:def 2</a></i>;<br/>
<a NAME="E10:8"/><b>then </b><i><font color="Green">E36</font></i>: 
<font color="Maroon">C</font> is <a href="rlvect_3.html#V1">linearly-independent</a>
 
<b>by </b><i>, <a class="ref" href="rlvect_3.html#T6">RLVECT_3:6</a></i>;<br/>
<a NAME="E11:8"/>
for <font color="Olive">v</font> being  <a href="rlvect_1.html#NM1">VECTOR</a> of <font color="Maroon">V</font> holds <br/> ( <font color="Olive">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_1.html#K2">(Omega).</a> <font color="Maroon">V</font> iff <font color="Olive">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font> )
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_2"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">v</font> be   <a href="rlvect_1.html#NM1">VECTOR</a> of <font color="Maroon">V</font>;<br/>

<div><b>hereby </b>
<div class="add"><b>assume </b><a NAME="E1:8_2_1"/>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_1.html#K2">(Omega).</a> <font color="Maroon">V</font>
 ;<br/><a NAME="E2:8_2_1"/><b>then </b>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="bhsp_1.html#G1">UNITSTR</a>(# the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">V</font>,the <a href="struct_0.html#U2">Zero</a> of <font color="Maroon">V</font>,the <a href="rlvect_1.html#U1">add</a> of <font color="Maroon">V</font>,the <a href="rlvect_1.html#U2">Mult</a> of <font color="Maroon">V</font>,the <a href="bhsp_1.html#U1">scalar</a> of <font color="Maroon">V</font> #)
 <b>by </b><i><a class="ref" href="rusub_1.html#D3">RUSUB_1:def 3</a></i>;<br/><a NAME="E3:8_2_1"/><b>then </b>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">A</font>
 <b>by </b><i>, <a class="ref" href="rusub_3.html#D2">RUSUB_3:def 2</a></i>;<br/><b>then consider </b><font color="Maroon">LA</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">A</font><b> such that </b><br/><a NAME="E5:8_2_1"/><i><font color="Green">E37</font></i>: 
<font color="Maroon">v</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">LA</font>
 <b>by </b><i><a class="ref" href="rusub_3.html#T1">RUSUB_3:1</a></i>;<br/><a NAME="E6:8_2_1"/>
 <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LA</font> <a href="tarski.html#R1">c=</a> the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font></span>)</span>
 <div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_2_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">w</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E1:8_2_1_1"/><i><font color="Green">E40</font></i>: 
<font color="Maroon">w</font> <a href="hidden.html#R2">in</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LA</font>
 ;<br/>

<a NAME="E2:8_2_1_1"/><b>then </b><i><font color="Green">E41</font></i>: 
( <font color="Maroon">w</font> <a href="hidden.html#R2">in</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LA</font> &amp;  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LA</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">A</font> )
 
<b>by </b><i><a class="ref" href="rlvect_2.html#D8">RLVECT_2:def 8</a></i>;<br/>
<b>reconsider </b><font color="Maroon">w'</font> = <font color="Maroon">w</font> as   <a href="rlvect_1.html#NM1">VECTOR</a> of <font color="Maroon">V</font> <b>by </b><i/>;<br/>
<a NAME="E4:8_2_1_1"/>
<font color="Maroon">w'</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">B</font>
 
<b>by </b><i><a class="ref" href="rusub_3.html#T21">RUSUB_3:21</a></i>;<br/>
<b>then consider </b><font color="Maroon">LB</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E6:8_2_1_1"/><i><font color="Green">E42</font></i>: 
<font color="Maroon">w</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">LB</font>
 <b>by </b><i><a class="ref" href="rusub_3.html#T1">RUSUB_3:1</a></i>;<br/>
<a NAME="E7:8_2_1_1"/>
 ex <font color="Olive">i</font> being   <a href="hidden.html#M1">set</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp; <font color="Maroon">w</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> )
 
<b>by </b><i>, , <a class="ref" href="funct_1.html#D5">FUNCT_1:def 5</a></i>;<br/>
<a NAME="E8:8_2_1_1"/><b>then </b><i><font color="Green">E43</font></i>: 
 <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LB</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 
<b>by </b><i/>;<br/>
<a NAME="E9:8_2_1_1"/>
 <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LB</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">C</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_2_1_1_1"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ; <i><font color="Red">:: according to </font></i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a><br/>

<b>assume </b><a NAME="E1:8_2_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">LB</font>
 ;<br/>

<b>hence </b><a NAME="E2:8_2_1_1_1"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <font color="Maroon">C</font>
 <b>by </b><i>, <a class="ref" href="tarski.html#D4">TARSKI:def 4</a></i>;<br/>


</div><b>end;</b></div>
<a NAME="E10:8_2_1_1"/><b>then </b>
<font color="Maroon">LB</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">C</font>
 
<b>by </b><i><a class="ref" href="rlvect_2.html#D8">RLVECT_2:def 8</a></i>;<br/>
<a NAME="E11:8_2_1_1"/><b>then </b>
<font color="Maroon">w</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font>
 
<b>by </b><i>, <a class="ref" href="rusub_3.html#T1">RUSUB_3:1</a></i>;<br/>
<b>hence </b><a NAME="E12:8_2_1_1"/>
<font color="Maroon">w</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font></span>)</span>
 <b>by </b><i><a class="ref" href="rlvect_1.html#D1">RLVECT_1:def 1</a></i>;<br/>


</div><b>end;</b></div><b>then consider </b><font color="Maroon">LC</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">C</font><b> such that </b><br/><a NAME="E8:8_2_1"/><i><font color="Green">E44</font></i>: 
 <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">LA</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">LC</font>
 <b>by </b><i><a class="ref" href="rusub_3.html#T17">RUSUB_3:17</a></i>;<br/><b>thus </b><a NAME="E9:8_2_1"/>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font>
 <b>by </b><i>, , <a class="ref" href="rusub_3.html#T1">RUSUB_3:1</a></i>;<br/></div>
<b>end;</b></div>

<b>assume </b><a NAME="E2:8_2"/>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font>
 ;<br/>

<a NAME="E3:8_2"/>
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <a href="bhsp_1.html#G1">UNITSTR</a>(# the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">V</font>,the <a href="struct_0.html#U2">Zero</a> of <font color="Maroon">V</font>,the <a href="rlvect_1.html#U1">add</a> of <font color="Maroon">V</font>,the <a href="rlvect_1.html#U2">Mult</a> of <font color="Maroon">V</font>,the <a href="bhsp_1.html#U1">scalar</a> of <font color="Maroon">V</font> #)
 
;<br/>
<a NAME="E4:8_2"/><b>then </b>
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <span class="p1">(<span class="default"><a href="rusub_1.html#K2">(Omega).</a> <font color="Maroon">V</font></span>)</span>
 
<b>by </b><i><a class="ref" href="rusub_1.html#D3">RUSUB_1:def 3</a></i>;<br/>
<b>hence </b><a NAME="E5:8_2"/>
<font color="Maroon">v</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_1.html#K2">(Omega).</a> <font color="Maroon">V</font>
 <b>by </b><i><a class="ref" href="rlvect_1.html#D1">RLVECT_1:def 1</a></i>;<br/>


</div><b>end;</b></div>
<a NAME="E12:8"/><b>then </b>
 <a href="rusub_1.html#K2">(Omega).</a> <font color="Maroon">V</font> <a href="hidden.html#R1">=</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font>
 
<b>by </b><i><a class="ref" href="rusub_1.html#T25">RUSUB_1:25</a></i>;<br/>
<a NAME="E13:8"/><b>then </b>
 <a href="bhsp_1.html#G1">UNITSTR</a>(# the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">V</font>,the <a href="struct_0.html#U2">Zero</a> of <font color="Maroon">V</font>,the <a href="rlvect_1.html#U1">add</a> of <font color="Maroon">V</font>,the <a href="rlvect_1.html#U2">Mult</a> of <font color="Maroon">V</font>,the <a href="bhsp_1.html#U1">scalar</a> of <font color="Maroon">V</font> #) <a href="hidden.html#R1">=</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">C</font>
 
<b>by </b><i><a class="ref" href="rusub_1.html#D3">RUSUB_1:def 3</a></i>;<br/>
<a NAME="E14:8"/><b>then </b><i><font color="Green">E47</font></i>: 
<font color="Maroon">C</font> is    <a href="rusub_3.html#M1">Basis</a> of <font color="Maroon">V</font>
 
<b>by </b><i>, <a class="ref" href="rusub_3.html#D2">RUSUB_3:def 2</a></i>;<br/>
<a NAME="E15:8"/>
<font color="Maroon">B</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">C</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_3"><b>proof </b></a><div class="add">

<b>assume </b><a NAME="E1:8_3"/>
not <font color="Maroon">B</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">C</font>
 ;<br/>

<b>then consider </b><font color="Maroon">v</font> being    <a href="hidden.html#M1">set</a> <b> such that </b><br/><a NAME="E3:8_3"/><i><font color="Green">E50</font></i>: 
<font color="Maroon">v</font> <a href="hidden.html#R2">in</a> <font color="Maroon">B</font>
 <b>and </b><br/><a NAME="E4:8_3"/><i><font color="Green">E51</font></i>: 
not <font color="Maroon">v</font> <a href="hidden.html#R2">in</a> <font color="Maroon">C</font>
 <b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>
<b>set </b><font color="Maroon">D</font> = <font color="Maroon">B</font> <a href="subset_1.html#K7">\</a> <font color="Maroon">C</font>;<br/>
<a NAME="E5:8_3"/><i><font color="Green">E52</font></i>: 
<font color="Maroon">B</font> <a href="subset_1.html#K7">\</a> <font color="Maroon">C</font> <a href="xboole_0.html#R1">misses</a> <font color="Maroon">C</font>
 
<b>by </b><i><a class="ref" href="xboole_1.html#T79">XBOOLE_1:79</a></i>;<br/>
<b>reconsider </b><font color="Maroon">B</font> = <font color="Maroon">B</font> as   <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font> ;<br/>
<b>reconsider </b><font color="Maroon">D</font> = <font color="Maroon">B</font> <a href="subset_1.html#K7">\</a> <font color="Maroon">C</font> as  non <a href="xboole_0.html#V1">empty</a> <a href="struct_0.html#NM2">Subset</a> of <font color="Maroon">V</font> <b>by </b><i>, , <a class="ref" href="xboole_0.html#D4">XBOOLE_0:def 4</a></i>;<br/>
<font color="Maroon">C</font> <a href="subset_1.html#K4">\/</a> <span class="p1">(<span class="default"><font color="Maroon">B</font> <a href="subset_1.html#K7">\</a> <font color="Maroon">C</font></span>)</span> = 
<font color="Maroon">C</font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">B</font>
<b>by </b><i><a class="ref" href="xboole_1.html#T39">XBOOLE_1:39</a></i>
<br/>.= 
<font color="Maroon">B</font>
<b>by </b><i>, <a class="ref" href="xboole_1.html#T12">XBOOLE_1:12</a></i>
;<br/>
<a NAME="E9:8_3"/><b>then </b>
<font color="Maroon">B</font> <a href="hidden.html#R1">=</a> <font color="Maroon">C</font> <a href="subset_1.html#K4">\/</a> <font color="Maroon">D</font>
 
;<br/>
<b>hence </b><a NAME="E10:8_3"/>
contradiction
 <b>by </b><i>, , , <a class="ref" href="rusub_3.html#T26">RUSUB_3:26</a></i>;<br/>


</div><b>end;</b></div>
<a NAME="E16:8"/><b>then </b><i><font color="Green">E53</font></i>: 
<font color="Maroon">B</font> <a href="hidden.html#R1">=</a> <font color="Maroon">C</font>
 
<b>by </b><i>, <a class="ref" href="xboole_0.html#D10">XBOOLE_0:def 10</a></i>;<br/>
<b>defpred </b><font color="Maroon">S<sub>1</sub></font>[   <a href="hidden.html#M1">set</a> ,   <a href="hidden.html#M1">set</a> ] <b>means </b> ex <font color="Olive">L</font> being   <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> st <br/>( <font color="Maroon">a<sub>2</sub></font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">a<sub>1</sub></font> );<br/>
<a NAME="E17:8"/><i><font color="Green">E54</font></i>: 
for <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> <br/> for <font color="Olive">y1</font>, <font color="Olive">y2</font> being   <a href="hidden.html#M1">set</a>   st <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span> &amp; <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">i</font>,<font color="Olive">y1</font>] &amp; <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">i</font>,<font color="Olive">y2</font>] holds <br/><font color="Olive">y1</font> <a href="hidden.html#R1">=</a> <font color="Olive">y2</font>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_4"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">i</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/><b>let </b><font color="Maroon">y1</font> be    <a href="hidden.html#M1">set</a> , <font color="Maroon">y2</font> be    <a href="hidden.html#M1">set</a> ;<br/>



<b>assume </b><b>that </b><br/><a NAME="E1:8_4"/>
<font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span>
 <b>and </b><br/><a NAME="E2:8_4"/><i><font color="Green">E56</font></i>: 
<font color="Maroon">S<sub>1</sub></font>[<font color="Maroon">i</font>,<font color="Maroon">y1</font>]
 <b>and </b><br/><a NAME="E3:8_4"/><i><font color="Green">E57</font></i>: 
<font color="Maroon">S<sub>1</sub></font>[<font color="Maroon">i</font>,<font color="Maroon">y2</font>]
 ;<br/>

<b>consider </b><font color="Maroon">L1</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E5:8_4"/><i><font color="Green">E58</font></i>: 
<font color="Maroon">y1</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L1</font>
 <b>and </b><br/><a NAME="E6:8_4"/><i><font color="Green">E60</font></i>: 
 <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font>
 <b>by </b><i/>;<br/>
<b>consider </b><font color="Maroon">L2</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E8:8_4"/><i><font color="Green">E61</font></i>: 
<font color="Maroon">y2</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L2</font>
 <b>and </b><br/><a NAME="E9:8_4"/><i><font color="Green">E73</font></i>: 
 <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L2</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font>
 <b>by </b><i/>;<br/>
<a NAME="E10:8_4"/>
(  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L1</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font> &amp;  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L2</font> <a href="tarski.html#R1">c=</a> <font color="Maroon">B</font> )
 
<b>by </b><i><a class="ref" href="rlvect_2.html#D8">RLVECT_2:def 8</a></i>;<br/>
<b>hence </b><a NAME="E11:8_4"/>
<font color="Maroon">y1</font> <a href="hidden.html#R1">=</a> <font color="Maroon">y2</font>
 <b>by </b><i>, , , <a class="ref" href="rusub_4.html#T1" target="_self">Th1</a>, , <a class="ref" href="rlvect_5.html#T1">RLVECT_5:1</a></i>;<br/>


</div><b>end;</b></div>
<a NAME="E18:8"/><i><font color="Green">E74</font></i>: 
for <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>   st <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span> holds <br/> ex <font color="Olive">x</font> being   <a href="hidden.html#M1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Olive">i</font>,<font color="Olive">x</font>]
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_5"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">i</font> be    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> ;<br/>

<b>assume </b><a NAME="E1:8_5"/>
<font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span>
 ;<br/>

<a NAME="E2:8_5"/><b>then </b>
<font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font>
 
<b>by </b><i><a class="ref" href="finseq_1.html#D3">FINSEQ_1:def 3</a></i>;<br/>
<a NAME="E3:8_5"/><b>then </b>
<font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font> <a href="hidden.html#R2">in</a> the <a href="struct_0.html#U1">carrier</a> of <font color="Maroon">V</font>
 
<b>by </b><i><a class="ref" href="finseq_2.html#T13">FINSEQ_2:13</a></i>;<br/>
<a NAME="E4:8_5"/><b>then </b>
<font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font> <a href="rlvect_1.html#R1">in</a>  <a href="rusub_3.html#K1">Lin</a> <font color="Maroon">B</font>
 
<b>by </b><i><a class="ref" href="rusub_3.html#T21">RUSUB_3:21</a></i>;<br/>
<b>then consider </b><font color="Maroon">L</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E6:8_5"/><i><font color="Green">E91</font></i>: 
<font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L</font>
 <b>by </b><i><a class="ref" href="rusub_3.html#T1">RUSUB_3:1</a></i>;<br/>
<a NAME="E7:8_5"/>
<font color="Maroon">S<sub>1</sub></font>[<font color="Maroon">i</font>, <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L</font>]
 
<b>by </b><i/>;<br/>
<b>hence </b><a NAME="E8:8_5"/>
 ex <font color="Olive">x</font> being   <a href="hidden.html#M1">set</a>  st <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon">i</font>,<font color="Olive">x</font>]
 ;<br/>


</div><b>end;</b></div>
<a NAME="E19:8"/>
 ex <font color="Olive">q</font> being  <a href="finseq_1.html#NM1">FinSequence</a> st <br/>(  <a href="finseq_1.html#K4">dom</a> <font color="Olive">q</font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span> &amp; ( for <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>   st <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span> holds <br/><font color="Maroon">S<sub>1</sub></font>[<font color="Olive">i</font>,<font color="Olive">q</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font>] ) )
 
<b>from </b><i><a class="ref" href="finseq_1.html#S1">FINSEQ_1:sch 1</a>(, );<br/></i>
<b>then consider </b><font color="Maroon">q</font> being   <a href="finseq_1.html#NM1">FinSequence</a><b> such that </b><br/><a NAME="E21:8"/><i><font color="Green">E93</font></i>: 
(  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">q</font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span> &amp; ( for <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>   st <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K2">Seg</a> <span class="p1">(<span class="default"><a href="finseq_1.html#K3">len</a> <font color="Maroon">p</font></span>)</span> holds <br/><font color="Maroon">S<sub>1</sub></font>[<font color="Olive">i</font>,<font color="Maroon">q</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font>] ) )
 ;<br/>
<a NAME="E22:8"/><i><font color="Green">E94</font></i>: 
 <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> <a href="hidden.html#R1">=</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">q</font>
 
<b>by </b><i>, <a class="ref" href="finseq_1.html#D3">FINSEQ_1:def 3</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_6"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:8_6"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <font color="Maroon">q</font>
 ;<br/><b>then consider </b><font color="Maroon">i</font> being    <a href="hidden.html#M1">set</a> <b> such that </b><br/><a NAME="E3:8_6"/><i><font color="Green">E95</font></i>: 
<font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">q</font>
 <b>and </b><br/><a NAME="E4:8_6"/><i><font color="Green">E96</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">q</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font>
 <b>by </b><i><a class="ref" href="funct_1.html#D5">FUNCT_1:def 5</a></i>;<br/><b>reconsider </b><font color="Maroon">i</font> = <font color="Maroon">i</font> as    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  <b>by </b><i/>;<br/><b>consider </b><font color="Maroon">L</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E7:8_6"/><i><font color="Green">E97</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L</font>
 <b>and </b><br/><a NAME="E8:8_6"/><i><font color="Green">E98</font></i>: 
 <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font>
 <b>by </b><i>, , <a class="ref" href="rusub_4.html#T1" target="_self">Th1</a></i>;<br/><b>thus </b><a NAME="E9:8_6"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 <b>by </b><i>, , , </i>;<br/></div><b>end;</b></div>
<a NAME="E24:8"/><b>then </b><i><font color="Green">E99</font></i>: 
 <a href="relat_1.html#K2">rng</a> <font color="Maroon">q</font> <a href="tarski.html#R1">c=</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 
<b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_7"><b>now </b></a><div class="add"><b>let </b><font color="Maroon">x</font> be    <a href="hidden.html#M1">set</a> ;<br/><b>assume </b><a NAME="E1:8_7"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 ;<br/><b>then consider </b><font color="Maroon">L</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E3:8_7"/><i><font color="Green">E100</font></i>: 
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L</font>
 <b>and </b><br/><a NAME="E4:8_7"/><i><font color="Green">E101</font></i>: 
 ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> )
 ;<br/><b>consider </b><font color="Maroon">i</font> being    <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a> <b> such that </b><br/><a NAME="E6:8_7"/><i><font color="Green">E102</font></i>: 
( <font color="Maroon">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font> )
 <b>by </b><i/>;<br/><a NAME="E7:8_7"/>
( <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon">i</font>,<font color="Maroon">x</font>] &amp; <font color="Maroon">S<sub>1</sub></font>[<font color="Maroon">i</font>,<font color="Maroon">q</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font>] )
 <b>by </b><i>, , <a class="ref" href="rusub_4.html#T1" target="_self">Th1</a>, </i>;<br/><a NAME="E8:8_7"/><b>then </b>
<font color="Maroon">x</font> <a href="hidden.html#R1">=</a> <font color="Maroon">q</font> <a href="funct_1.html#K1">.</a> <font color="Maroon">i</font>
 <b>by </b><i>, , , </i>;<br/><b>hence </b><a NAME="E9:8_7"/>
<font color="Maroon">x</font> <a href="hidden.html#R2">in</a>  <a href="relat_1.html#K2">rng</a> <font color="Maroon">q</font>
 <b>by </b><i>, , <a class="ref" href="funct_1.html#D5">FUNCT_1:def 5</a></i>;<br/></div><b>end;</b></div>
<a NAME="E26:8"/><b>then </b>
<span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span>  <a href="tarski.html#R1">c=</a>  <a href="relat_1.html#K2">rng</a> <font color="Maroon">q</font>
 
<b>by </b><i><a class="ref" href="tarski.html#D3">TARSKI:def 3</a></i>;<br/>
<a NAME="E27:8"/><b>then </b><i><font color="Green">E103</font></i>: 
<span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span>  is <a href="finset_1.html#V1">finite</a>
 
<b>by </b><i>, <a class="ref" href="xboole_0.html#D10">XBOOLE_0:def 10</a></i>;<br/>
<a NAME="E28:8"/>
for <font color="Olive">R</font> being   <a href="hidden.html#M1">set</a>   st <font color="Olive">R</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span>  holds <br/><font color="Olive">R</font> is <a href="finset_1.html#V1">finite</a>
 
<div><a class="txt" onclick="hs2(this)" href="javascript:()" title="8_8"><b>proof </b></a><div class="add">

<b>let </b><font color="Maroon">R</font> be    <a href="hidden.html#M1">set</a> ;<br/>

<b>assume </b><a NAME="E1:8_8"/>
<font color="Maroon">R</font> <a href="hidden.html#R2">in</a> <span class="p1">{<span class="default"> <span class="p2">(<span class="default"><a href="rlvect_2.html#K3">Carrier</a> <font color="Olive">L</font></span>)</span> where <font color="Olive">L</font> is    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font> :  ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Olive">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> ) </span>}</span> 
 ;<br/>

<b>then consider </b><font color="Maroon">L</font> being    <a href="rlvect_2.html#M2">Linear_Combination</a> of <font color="Maroon">B</font><b> such that </b><br/><a NAME="E3:8_8"/><i><font color="Green">E104</font></i>: 
<font color="Maroon">R</font> <a href="hidden.html#R1">=</a>  <a href="rlvect_2.html#K3">Carrier</a> <font color="Maroon">L</font>
 <b>and </b><br/><a NAME="E4:8_8"/>
 ex <font color="Olive">i</font> being   <a href="subset_1.html#M1">Element</a> of  <a href="numbers.html#K5">NAT</a>  st <br/>( <font color="Olive">i</font> <a href="hidden.html#R2">in</a>  <a href="finseq_1.html#K4">dom</a> <font color="Maroon">p</font> &amp;  <a href="rlvect_2.html#K6">Sum</a> <font color="Maroon">L</font> <a href="hidden.html#R1">=</a> <font color="Maroon">p</font> <a href="funct_1.html#K1">.</a> <font color="Olive">i</font> )
 ;<br/>
<b>thus </b><a NAME="E5:8_8"/>
<font color="Maroon">R</font> is <a href="finset_1.html#V1">finite</a>
 <b>by </b><i/>;<br/>


</div><b>end;</b></div>
<b>hence </b><a NAME="E29:8"/>
<font color="Maroon">B</font> is <a href="finset_1.html#V1">finite</a>
 <b>by </b><i>, <a class="ref" href="rusub_4.html#T1" target="_self">Th1</a>, <a class="ref" href="finset_1.html#T25">FINSET_1:25</a></i>;<br/>


</div>
